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Impact of semitrailer tyre pressure upon passive resistance and tractor unit operation economy

Author

Listed:
  • P. Novák
  • T. Šmerda
  • J. Čupera

Abstract

The aim of the measurement was to establish and prove the effect of the semitrailer tyre pressure on the magnitude of power losses and energy intensity in a tractor unit operation. The measured and calculated values were interlaid with the corresponding functions by means of regression analysis considering the magnitude of the determination coefficient (determination index). The values of the determination index ranged from 0.95 to 0.99 for regression functions; all the regression function were highly reliable at 0.01 relevance level. The difference of the lost power was recorded at the speed of 35 km/h, 1.82 kN between 170 kPa and 300 kPa pressures. The energy intensity of the tractor unit operated on the testing route changed as a result of increasing the semitrailer tyre pressure from 170 kPa to 240 kPa while its hourly consumption dropped by 1.9 l/h (i.e. 6.3%).

Suggested Citation

  • P. Novák & T. Šmerda & J. Čupera, 2009. "Impact of semitrailer tyre pressure upon passive resistance and tractor unit operation economy," Research in Agricultural Engineering, Czech Academy of Agricultural Sciences, vol. 55(4), pages 129-135.
    • Handle: RePEc:caa:jnlrae:v:55:y:2009:i:4:id:13-2009-rae
    DOI: 10.17221/13/2009-RAE
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    Cited by:

    1. M. Žitňák & M. Korenko, 2011. "Technical-economical indicators in the sugar beet transportation management," Research in Agricultural Engineering, Czech Academy of Agricultural Sciences, vol. 57(2), pages 63-71.
    2. J. Čupera & F. Bauer & L. Severa & M. Tatíček, 2011. "Analysis of force effects measured in the tractor three-point linkage," Research in Agricultural Engineering, Czech Academy of Agricultural Sciences, vol. 57(3), pages 79-87.
    3. M. Helexa, 2014. "Monitoring the impact of tyre inflation pressure on tensile properties of forest tractors," Research in Agricultural Engineering, Czech Academy of Agricultural Sciences, vol. 60(4), pages 127-133.

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